Sanding and polishing machine.



PATENTED MAY 10, 1904.

F. URBAN. SANDING AND POLISHING MACHINE.

APPLIOATION FILED MAY 16, 1903.

3 8HBETB-SHBET 1.

H0 MODEL.

Eg /ll PATENTED MAY 10, 1904. F. URBAN. SANDING AND POLISHING MACHINE.

AFPLIUA'I'IOH FILED MAY 16, 1 903.

a sums-sum 2 N0 MODEL.

P. URBAN.

SANDING AND POLISHING MACHINE. APPLIUATION'IILED mule, 1903. no uonnL.

PATBNTED MAY 10, 1904;.

a sHEnTs-sHnnT a Eli UNITED STATES Patented May 10, 1904.

PATENT OFFICE.

FRANK URBAN, OF BELVIDERE, NEW JERSEY.

SANDING AND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No 759,776, dated May 10, 1904.

Application filed May 16, 1903. Serial No. 157,504- (No model.)

To all whom it 777/1767] concern:

Be it known that I, FRANK URBAN, a citizen of the United States, reslding at Bclvidere,

- county of Warren, and State of New Jersey,

have invented a certain new and useful Improvement in Sanding and Polishing Machines, of which the following is a specification.

My invention relates to anew and useful improvement in sanding and polishing machines, and has for its object to provide a machine designed to be run by power, said. power being communicated through a flexible shaft to removable attachments for sandpapering or polishing surfaces. There are three different attachments designed to be attached to the machine, one attachment doing the polishing or sanding by a reciprocating movement, the other having a rotary flat surface, and the other attachment carrying a rotating cylinder.

With these ends in view this invention eonsists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same, the construction and operation will now be described in detail, referring to the accompanyingdrawings, forming apart of this specification, in which- Figure 1 illustrates a side elevation of the power-transmission apparatus; Fig. 2, a longitudinal section through the attachment in V which the reciprocating block is used; Fig. 3,

a section on the line 3 3 of Fig. 2; Fig. 4C, a perspective view of the holder to be attached to the reciprocating block, which holder is designed to hold the sandpaper or polishing cloth; Fig. 5, a cross-section through Fig. 1. Figs. 6, 7, and 8 are end views of sandpaperholders, showing modified forms of surfaces for sanding or polishing different-shape material; Fig. 9, an attachment designed to be inserted between the sandpaper-holder and reciprocating block for sandpapering in cavities or grooves; Fig. 10, a longitudinal section through the attachment having a flat rotary surface; Fig. 11, a spring jacket designed to hold the polishing cloth or paper to the holder; Fig. 12, a vertical section through the case and ring whereby the paper is secured to the holder; Fig. 13, a plan view of the ring designed to rest upon the upper edge of the case; Fig. 1 1, a longitudinal section through an attachment designed to polish or sandpaper by a rotating roller; Fig. 15, a cross-section through the roller.

Referring to Fig. 1, A represents a vertical shaft journaled in suitable bearings, and this shaft is provided with the fast and loose pulleys A. A is a pulley secured to the shaft A between the two bearings of a swinging arm B. This arm is pivoted loosely upon the shaft A above and below the pulley A and this arm has journaled in its outer end a small pulley B. A belt runs around the pulley A and is twisted and run around a pulley B. The shaft B", to which the pulley B is secured, has also secured thereto a larger pulley B, and secured to the shaft B is an arm O, in the outer end of which is journaled a pulley C,around which a belt or cord C runs, which also extends around the pulley B. C" is a counte1'balaneingweight secured upon the end of the arm (1 upon the opposite side of the pivotal point from the pulley C. l) is a flexible shaft secured to the pulley C, and the other end of this flexible shaft is designed to be attached to the attachments to be described later. It will thus be seen that this transmission device may be moved either horizontally by swinging the arm B or vertically by swinging the arm 0, and a further range of movement is given through the flexible shaft 1). In this way the attachments can be moved to any portion of the article being operated upon.

In Fig. 2 Ihave shown an attachment whereby the sanding or polishing is done by a reciprocating movement, and this attachment consists of a shaft E, mounted in suitable bearings in a frame F, and this shaft carries a screw Ur, provided with a double thread. Below the screw G- and secured. at each end in the frame F are guide-rods H, upon which is adapted to slide a block H. Pivoted in the upper side of this block is a traveler H which is designed to travel in the screw-thread of the screw Ur, and this traveler is shaped in the usual manner, so that when one end of the screw-thread is reached it will turn and enter the other screw-thread, and thus travel backward and forward while the screw is revolving always in the same direction. This is a well-known movement and does not need to be described in detail. To the lower end of the block H is designed to be secured the sandpaper-holders, which will be described later. Secured to one end of the shaft E is one member E of a clutch. The other member E of the clutch is formed upon the end of a shaft E arranged in alinement with the shaft E and journaled in slidable bearings in an extension of the frame F. By loosening the screw F and sliding the bearing forward or backward the clutch members may be thrown in or out of engagement. The rearward end of the shaft E is connected in such a manner to the flexible shaft D that the connection will not be afi'ected by the sliding of the cloth. Theclutch member E, with its bearing and other attachments, is secured to the end of the flexible shaft D, as shown in Fig. 2, and may be easily removed by the removal of the screw E*, and each of the attachments carry the a other member E of the clutch, so that it is only necessary to remove the screw E" and insert the clutch member and its attachments in the frame of the tools, so that it is made perfectly interchangeable.

In Fig. 4 I have shown one form of sandpaper-holder which is designed to be attached to the lower end of the block H, and the block H is provided at each end with depressions H and the holder has secured upon its center upper surface a strip I, which is bent upward at each end to form springs I, which are adapted to engage the notches H and hold the holder to the block. Pins I extend upward from the holder and are adapted to enter the holes H in the block, so as to hold the holder against lateral or longitudinal movement relative to the block. The holder, as shown in Fig. 4, consists of a flat under surface J and the inclined sides J. A piece of felt or other soft material J 2 is secured to the under side of the surface J, and the sandpaper or polishing material passes underneath this felt around the sides of the holder, and the edge of the paper or material is clamped in between the outside of the inclined sides J and plates K. These plates are clamped upon the paper by means of the screws K, whereby by a simple turn of the screws the plates can be loosened or tightened from the clamp. K represents links passing through the plates and also through the inclined sides J, so as to hold the plates in position when the screws are disengaged.

In Figs. 6, 7, and 8 I have shown different forms of holders, in all of which the fastening device is identically the same, but the under surface of the holders is concaved in one instance and conveXed in another and beveled in another, so as to accommodate itself to different surfaces to be polished or sanded. Of course it is understood that any form of under surface could be used, and these three forms are only shown to illustrate that the same fastoning could be used in all cases.

In some instances it is desirable to sand or polish in a deep groove or cavity which could not be reached by the holder being attached directly to the reciprocating block. In such cases I provide an intermediate block, as shown in Fig. 9, which is provided with springs L at each end and projecting from the upper surface, these springs being designed to engage the notches H in the block. and this intermediate block is provided with pins L to enter the holes H. On the ends of the block near the lower surface are provided notches L and in the lower surface are provided holes L so that the holder may be attached to the under surface of the block the same as to the reciprocating block. Of course if a greater reach is desired two or more of these blocks could be used and attached one to the other, as is well understood.

In Fig. 10 I have illustrated a form of sanding and polishing tool by which the sanding and polishing is done by a rotating flat disk. In this tool the clutch member E is attached to a shaft M, which is journaled in suitable hearings in the framework N. To the other end of the shaft M is secured a beveled wheel M, which meshes with the beveled wheel M secured upon a vertical spindle M. This spindle is journaled in suitable hearings in the frame N and projects a slight distance below the frame and is threaded upon this lower end, and upon this threaded end is designed to be secured the holder O, the lower end of which consists of a flat disk O, under which the sandpaper or polishing material O is designed to be secured. P is a jacket made of spring material and divided and hinged together on one side, and on the other side the edges are adapted to be normally held together by a latch P The lower end of the jacket P is slit vertically, so as to form the springlingers P These lingers are designed to hold the sandpaper or polishing material to the holder, and this paper is attached to the holder in the following manner: Q is a cylindrical case open at its upper end, and the springjacket is set in this case with the flange Presting upon the upper rim of the case. The sandpaper or polishing material is then laid over the top of the jacket, and the holder O is forced downward into the case through the spring-jacket and of course carries the sandpaper with it, which will be bent upward around the holder and be held by the spring fingers P as shown in Fig. 10. For the purpose of allowing the same case Q to be used for different-size holders and jackets I provide rings R, which may be set upon the upper edge of the case Q, and the flange P of the jacket then rests upon the ring. Thus by using difl'erent-size rings any-size jacket or holder may be used.

In Fig. 14; I have shown a sanding and polishing tool in which a rotating roller is used for the polishing and sanding. In this case the clutch member E is secured at one end of a shaft S, and this shaft S is coupled to a shaft T, and mounted upon this shaft T, so as to revolve therewith, is a roller U, which roller is divided diametrically, and the sand paper or polishing material is arranged upon the outside of the roll, the ends being clamped between the two halves, as shown in Fig. 15, p insU extending from one half into the other through the sandpaper or polishing material. This roll is held so as to revolve with the shaft 1 by means of the stationary washer 'I", secured to the shaft T at one end, and the movable washer T, which is forced against the other end of the roller by means of the nut T threaded upon the shaft T. 'Ihese Washers are provided with teeth which are forced into the roller at each end, and so cause the roller to revolve with the shaft '1. It will thus be seen that all of the three attachments which I have described can be easily attached or detached from the power-transmission de vice by the simple removal or insertion of one screw, and by the use of these three attachments any kind of sanding or polishing can be done and at any place upon the article.

Of course I do not wish to be limited to the exact construction here shown, as slight modifications could be made without departing from the spirit of my invention.

Having thus fully described my invention, what I claim as new and useful is- 1. In a device of the character described, a flexible shaft, means for revolving said flexible shaft, sanding or polishing tool adapted to be connected to the flexible shaft, holders carried by said sanding and polishing tool, means for attaching the abrading material to the holder, means for transmitting motion to the holder from the flexible shaft, a clutch, one member of which is attached to the flexible shaft, the other member being carried by each attachment, and means for throwing the clutch members in and out of engagement, and means for holding the flexible shaft in connection with the tool, as specified.

2. In a device of the character described, a vertical shaft, a pulley secured to the vertical shaft, an arm pivoted upon the vertical shaft, a shaft journaled horizontally in the outer end of said arm, a pulley secured to said shaft, a belt passing around the pulley in the outer end of the arm, and the pulley upon the vertical shaft, a second pulley secured to the shaft in the outer end of the arm, an arm secured to said shaft, a pulley journaled in the outer end of said arm, a belt or cord adapted to pass around said pulley and also around the second pulley carried by the first named arm, a counterbalance-Weight upon the other end of the horizontally-pivoted arm, a flexible shaft adapted to be revolved by the pulley journaled in the outer end of the horizontally-pivoted arm, sanding or polishing tools adapted to be connected to the flexible shaft, each of said polishingtools being provided with a holder for holding the abrading material, means for securing the abrading material to the holders, means for transmitting motion from the flexible shaft to the holders, a clutch, one member of which is carried by the flexible shaft, the other member being carried by each of the sanding and polishing tools, means for connecting the end of the flexible shaft temporarily to each of the tools, and means for throwing the clutch in and out of engagement, as specified.

'3. In a device of the character described, a flexible shaft, means for communicating power to said flexible shaft, a sanding or polishing tool adapted to be connected to the flexible shaft, said tool consisting of a frame, adoublethreaded screw journaled in said frame, a reciprocating block, rods secured to the frame for guiding the plug, a traveler pivoted in the block and traveling in the thread of the screw, an abradinganaterial holder adapted to be secured to the lower surface of the block, means 7 for securing said holder to the block, means for securing the abrading material to the holder, a clutch, one member of which is carried by the end of the flexible shaft, the other member being carried by the tool, means for temporarily securing the flexible shaft to the tool, and means for throwing the clutch in and out of engagement, as specified.

f. In a device of the character described, a reciprocating block, means for reciprocating said block, a holder adapted to be attached to said block, means for securing the abrading material to said holder, intermediate blocks adapted to be interposed between the reciproeating block and the holder, means for securing the interlncdiate block to the reciprocating block, and means for securing the holder either to the reciprocating block or to the intermediate block, as specified.

In testimony whereof I have hereunto affixed my signature in the presence of two subscribing witnesses.

FRANK URBAN.

Witnesses: Pn'rnn H CownLL VVILLrs N. WILsoN. 

